Actual Stair Reinforcement
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RCC structure is formed with several building components like footings, columns, beams, slabs, staircase etc. These components are reinforced with steel to enhance the longevity of the structure. Staircase is considered as one of the most vital elements in a RCC structure.
Standard Stair Detail:
Any well planned stair should contains the following standards for smooth, quick and secure ascent/descent.
1. Location: The location of the staircase should be perfect in order to maintain adequate light and ventilation with free access from all the rooms.
2. Stair width: Though it differs with situation but there should be the standard recommended dimensions depending on the types of the buildings.
3. Length of flight: A flight should contain not lower than three risers and not in excess of 16 risers.
4. Pitch of stair: Stairs should be pitched from 15 degrees to 55 degrees; but recommended angle should be kept among 25 to 40 degrees. Pitch of long should be flattened with landings.
5. Headroom: Lowest Clearance from tread to the soffit of stair over (exact vertical measurement) should be retained as 2.1m.
6. Materials: Strong resistance capacity against fire as far as possible.
7. Baluster: Open well stairs should contain it get rid of any accidents.
8. Guarding: Stairs specifically in domestic premises should have guarding to one or both sides by means of a bannister i.e. an assembly of uprights and a handrail.
9. Landing: Width of the landing should not below the stair flight at any situation.
The quantity of materials for staircase can be calculated as follow :-
1. Volume of cement = 1/7 x Dry volume = 1/7 x 159 = 22.66 cubic feet....
2. Volume of Sand = 2/7 x Dry volume = 2/7 x 159 = 45 cubic feet.
3. Volume of Aggregate = 4/7 x Dry volume = 4/7 x 159 = 91 cubic feet.
The plans for RCC staircase should be accurate and proper. But the most important factor is to properly read these plans. So, there should proper knowledge regarding the main symbols and signs in the plans.
In the following civil engineering tutorial, you will get some vital information about how to read RCC staircase plan practically on the construction site.
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